It has the Chrysanthemum on the top of the receiver, as well as the Japanese Characters (Type 99),
It has the folding / sliding sight. The stamped serial number on the left side of the receiver is 46498 and the marking (Arsenal Mark) to the right of the serial indicates it was manufactured by Nagoya Arsenal. The serial number range (0-99,999) puts it as a series 1, this is confirmed by the stamped mark left of the serial.
I used the same page you linked (second link in your post) to as a source when looking up the markings.
So it's a Series 1 (#46498) Nagoya Arsenal Type 99 Rifle manufactured before 1943 (folding / sliding sight).
The stock is in decent shape but is worn (nicks, stractches, dings etc...). There was no sling or bayonet with it.